Thermally activated vent damper
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United States of America Patent
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-
Jan 21, 1992
Grant Date -
N/A
app pub date -
Jul 10, 1990
filing date -
Jul 10, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A thermally activated vent damper assembly for a flue is adapted to be situated in relation to the flue for occluding the passage of gas through the flue. A support member transverses the flue and suspends the damper member across the flue for movement between an open and a closed position. A thermally activated biasing member is operatively coupled between the support member and the damper member to bias the damper member in the open position in the presence of heat and to bias the damper member in the closed position in the absence of heat. The coupling of the biasing member between the support member and the damper member is such that potential sites for frictional inhibition of damper member movement are eliminated. Upon breakage or other failure of the biasing member to apply bias, the damper member defaults to or remains in an open position under the force of gravity, providing for a unique fail-safe feature.
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